Drive-chain



(Model.)

S. D. LOGKE.

DRIVE CHAIN.

No. 393,992. Patented Dec. 4, 1888.

w vtweoow zw M UNlTED STATES PATENT OFFICE.

SYLVANUS D. LOCKE, OF HOOSICK FALLS, NEV YORK.

.DRlVE-CHAIN.

SPECIFICATION forming part of Letters Patent No. 393,992, dated December4, 1888. Original application filed February 20, 1888, Serial No.264,666. Divided and this application filed March 24, 1888. Serial No.

(ModeL) parts 0 of the sprocket-bar and d of the end To all whom it mayconcern:

Be it known that I, SYL'VANUS D. LocKE, a

citizen of the United States, residing at Hoo- I sick Falls, in thecounty of Rcnsselaer, State which the following is a specification,reference being had therein to the accompanying drawings.

bar are bent or curved upward, as shown, from the ends of the linkmetal, while the hook or loop parts 6 and fol the same are formed downfrom the body thereof, leaving the central rectangular opening, I), andthen turned outward and upward, as shown. The

' metal taken to form the central opening is all utilized in the loops 6f. It is apparent, to al- The object of my invention is to provide a Inext to the end bar (If, should be slightly wider detachable rectangularlink for drive-chains,

that shall be equally as good and serviceable i and much cheaper thanthe oriilinarv castlink and also cheaper than any made of wire. 1 Thisob ect is attained by forming the link I from rolled or sheet metal insuch a manner that the link with its two side bars and its end andsprocket bars may be made from a single piece of sheet metal, theportion of the material taken from the opening of the link being punchedand rolled up or otherwise fashioned to form hollow cylindrical sprocketand end bars.

That others skilled in the art may make and use my invention, I willproceed to describe it, reference being had to the accompanyingdrawings, making a part of this specification, in which Figure l is aperspective view of two links of my chain with a locking-piece or keydetached. Fig. 2 is a side elevation of the same with the key in place.Fig. 3 a side elevation of the same without the key. Fig. i isa sideelevation of the same, showing the first position taken for coupling twolinks. Fig. 5 a side elevation showingthe right-hand link swung down andits end bar entering the sprocket-bar of the other link. Fig. (5 is aside elevation showing the two links coupled and in position forreceiving a key or lockingpiece. Fig. 7 is a cross oblique sectionthrough the links on the line :17 .r, Fig.

In the drawings, A A are two links of my chain. Each link has two sidebars, a a, and the rectangular central opening, I), as well as thesprocket-bar o c, and the end bars, d f. The sprocket-bar and end barare of the same hollow and substantially cylindrical form, the latter,however, havin its outer diameter a very little smaller thanv the innerdiameter of the former, so as to allow the end bar to freely turn orpivot in the sprocket-bar. The

l l l l l low the links to couple, that the opening 1),

than the loop c of the sprocket bar. For this reason I form the loop fat its base slightly wider than at its point, which is made of the samewidth as the loop c.

To join or couple two links it is only necessary to hold them in theposition shown in Fig. -l, with the hollow end bar of one resting on theedge of the part c of the sprocket-bar of the other, and then to swingthe right-hand link down on that edge as a pivot through the positionshown in Fig. 5, and nearly to the position shown in Fig. (i, or untilthe end bar has swung into the hollow of the sprocket-bar.

The links so made and joined will not separate or get uncoupled inactual work, but are somewhat liable to uncouple when the chain isthrown loosely about. A convenient way of locking them againstuncoupling is shown in the use or the key 71. This key, when the linksare in the position shown in Fig. (5, is readily inserted through theslit or opening in the sprocket-bin into the end bar, the forks or spursf of the key striding the loops c and f, so preventing lateraldisplacement. \Vhen this key is driven into the hollow of the, end barit will not fall out, even when the links are in the position shown inFig. 1;. \Vith the links in any other po:i i n it cannot escape, and thelinks cannot escape while the key is in. My invention, however, is notlimited to the use of a key, nor do I intend to limit my invention inall of its novel features to a rectangular link, as it is evident thatthe hollow open-end and sprocket bars may be used in connection with thewell-known central bar instead of the two sidebars, and the entire linkmight be cast either in completed form or in partially completed formand subsequently brought to a completed form.

Having described my invention,wliat I claim 1s 1. A detachable link fordrive-chains, having two side bars, a segmental end bar, and asprocket-bar provided with a coupling-hook struck from the internalportion of the blank and bent to shape, substantially as specified.

2. A detachable link for drive-chains, having two side bars, aseglnei'ital bar struck from the internal portion of the blanlgand asprocket-bar provided with a coupling-hook also struck from the internalportion of the blank and bent to shape, substantially as specified,

3. The link A, composed of the two side bars, a a, an end barhaving thepart (I and hook f,

and a sprocket-bar having a part, c, and hook e, substantially asdescribed. 15

l. The combination of the link A, having In testimony whereof I haveaffixed my sig- 2o nature in presence of two witnesses.

SYLVANUS D. LOCKE.

\Vitnesses:

E. B. STOCKING, 'W. S. DUVALL.

